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John E M Midgley
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Rolf Larisch North Lakes Clinical, Department of Nuclear Medicine, Medical Department I, Ruhr Center for Rare Diseases (CeSER), 20 Wheatley Avenue, Ilkley LS29 8PT, UK

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Johannes W Dietrich North Lakes Clinical, Department of Nuclear Medicine, Medical Department I, Ruhr Center for Rare Diseases (CeSER), 20 Wheatley Avenue, Ilkley LS29 8PT, UK
North Lakes Clinical, Department of Nuclear Medicine, Medical Department I, Ruhr Center for Rare Diseases (CeSER), 20 Wheatley Avenue, Ilkley LS29 8PT, UK

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Rudolf Hoermann North Lakes Clinical, Department of Nuclear Medicine, Medical Department I, Ruhr Center for Rare Diseases (CeSER), 20 Wheatley Avenue, Ilkley LS29 8PT, UK

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hypothyroidism that require thyroid hormone replacement (2, 3) . This is mainly done by administration of synthetic levothyroxine ( l -T 4 ), which is a well-established, convenient, safe and inexpensive treatment modality (4, 5) . However, this does not

Article Type:
Research Article
DOI:
https://doi.org/10.1530/EC-15-0056
Volume/Issue:
Volume 4: Issue 4
Open access
G Amiyangoda Department of Pharmacology, Faculty of Medicine, University of Peradeniya, Sri Lanka
Diabetes and Endocrine Unit, National Hospital, Kandy, Sri Lanka

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C N Antonypillai Diabetes and Endocrine Unit, National Hospital, Kandy, Sri Lanka

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S S C Gunatilake Diabetes and Endocrine Unit, National Hospital, Kandy, Sri Lanka

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T T Weerathunge Department of Community Medicine, Faculty of Medicine, University of Colombo, Sri Lanka

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D Ediriweera Health Data Science Unit, Faculty of Medicine, University of Kelaniya, Sri Lanka

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S G P D Kosgallana Diabetes and Endocrine Unit, National Hospital, Kandy, Sri Lanka

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R D P Jayawardana Department of Biochemistry, National Hospital, Kandy, Sri Lanka

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H A N D Thissera Department of Biochemistry, National Hospital, Kandy, Sri Lanka

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W J Emalka Faculty of medicine, University of Peradeniya, Sri Lanka

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H U Daraniyagala Faculty of medicine, University of Peradeniya, Sri Lanka

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Introduction Refractory hypothyroidism is characterized by an inadequate response to the standard dose of levothyroxine, resulting in persistent biochemical or clinical hypothyroidism ( 1 ). The recommended average daily dose of levothyroxine

Article Type:
Research Article
Collections:
Thyroid
DOI:
https://doi.org/10.1530/EC-24-0277
Volume/Issue:
Volume 13: Issue 10
Open access
Sílvia Santos Monteiro Division of Endocrinology, Diabetes and Metabolism. Department of Medicine, Centro Hospitalar Universitário do Porto, Largo Professor Abel Salazar Porto, Portugal

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Tiago Silva Santos Division of Endocrinology, Diabetes and Metabolism. Department of Medicine, Centro Hospitalar Universitário do Porto, Largo Professor Abel Salazar Porto, Portugal

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Ana Martins Lopes Division of Endocrinology, Diabetes and Metabolism. Department of Medicine, Centro Hospitalar Universitário do Porto, Largo Professor Abel Salazar Porto, Portugal

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José Carlos Oliveira Department of Clinical Pathology, Centro Hospitalar Universitário do Porto, Largo Professor Abel Salazar Porto, Portugal

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Cláudia Freitas Division of Endocrinology, Diabetes and Metabolism. Department of Medicine, Centro Hospitalar Universitário do Porto, Largo Professor Abel Salazar Porto, Portugal

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André Couto Carvalho Division of Endocrinology, Diabetes and Metabolism. Department of Medicine, Centro Hospitalar Universitário do Porto, Largo Professor Abel Salazar Porto, Portugal

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Introduction Oral levothyroxine (LT4) is the mainstay therapy for hypothyroidism. Absorption of oral LT4 occurs primarily in the small intestine within the first 3 h of ingestion, with an absorption rate of 60–80% ( 1 ). Initial LT4 dosing is

Article Type:
Research Article
Collections:
Thyroid
DOI:
https://doi.org/10.1530/EC-22-0355
Volume/Issue:
Volume 11: Issue 12
Open access
Alessandro Brancatella Endocrine Unit 1, Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy

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Claudio Marcocci Endocrine Unit 2, Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy

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with levothyroxine TSH suppressive therapy consists in the administration of levothyroxine (LT4) in order to reduce serum TSH levels below the normal range, maintaining normal levels of serum free T4 (FT4) and free T3 (FT3). Based on TSH levels

Article Type:
Review Article
DOI:
https://doi.org/10.1530/EC-20-0167
Volume/Issue:
Volume 9: Issue 7
Open access
Sahar Hossam El Hini Diabetes and Endocrinology Unit, Department of Internal Medicine, Faculty of Medicine, Minia University, Minia, Egypt

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Yehia Zakaria Mahmoud Department of Internal Medicine, Faculty of Medicine, Minia University, Minia, Egypt

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Ahmed Abdelfadel Saedii Department of Clinical Pathology, Faculty of Medicine, Minia University, Minia, Egypt

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Sayed Shehata Mahmoud Department of Cardiology, Faculty of Medicine, Minia University, Minia, Egypt

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Mohamed Ahmed Amin Department of Radiology, Faculty of Medicine, Minia University, Minia, Egypt

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Shereen Riad Mahmoud Diabetes and Endocrinology Unit, Department of Internal Medicine, Faculty of Medicine, Minia University, Minia, Egypt

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Ragaa Abdelshaheed Matta Diabetes and Endocrinology Unit, Department of Internal Medicine, Faculty of Medicine, Minia University, Minia, Egypt

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) evaluate the role of levothyroxine (LT4) replacement therapy on ANGPTL level after 6 months follow-up of achieved euthyroid state among naïve SCH and naïve OH groups in longitudinal arm; (ii) assess the association of ANGPTL3, 4 and 8 with the morphological

Article Type:
Research Article
DOI:
https://doi.org/10.1530/EC-21-0398
Volume/Issue:
Volume 10: Issue 12
Open access
Isabel M Abreu Faculty of Medicine, University of Porto, Alameda Professor Hernâni Monteiro, Porto, Portugal

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Eva Lau Faculty of Medicine, University of Porto, Alameda Professor Hernâni Monteiro, Porto, Portugal
Department of Endocrinology, Diabetes and Metabolism, Centro Hospitalar S. João, Alameda Professor Hernâni Monteiro, Porto, Portugal
Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal

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Bernardo de Sousa Pinto Faculty of Medicine, University of Porto, Alameda Professor Hernâni Monteiro, Porto, Portugal

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Davide Carvalho Faculty of Medicine, University of Porto, Alameda Professor Hernâni Monteiro, Porto, Portugal
Department of Endocrinology, Diabetes and Metabolism, Centro Hospitalar S. João, Alameda Professor Hernâni Monteiro, Porto, Portugal
Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal

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hypothyroidism should be treated, including those with a serum TSH value below 10 IU/L ( 14 ). To our knowledge, the data regarding the effect of levothyroxine treatment on lipid levels in selected patients, including apolipoproteins, originated from small

Article Type:
Research Article
DOI:
https://doi.org/10.1530/EC-17-0028
Volume/Issue:
Volume 6: Issue 3
Open access
Qingrong Pan Department of Endocrinology, Beijing Chao-yang Hospital, Capital Medical University, Beijing, China

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Shuxin Gao Department of General Practice, Cangzhou Central Hospital, Cangzhou, Hebei Province, China

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Xia Gao Department of Endocrinology, Beijing Chao-yang Hospital, Capital Medical University, Beijing, China

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Ning Yang Department of Endocrinology, Beijing Chao-yang Hospital, Capital Medical University, Beijing, China

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Zhi Yao Department of Endocrinology, Beijing Chao-yang Hospital, Capital Medical University, Beijing, China

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Yanjin Hu Department of Endocrinology, Beijing Chao-yang Hospital, Capital Medical University, Beijing, China

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Li Miao Department of Endocrinology, Beijing Chao-yang Hospital, Capital Medical University, Beijing, China

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Zhe Chen Department of Endocrinology, Beijing Chao-yang Hospital, Capital Medical University, Beijing, China

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Guang Wang Department of Endocrinology, Beijing Chao-yang Hospital, Capital Medical University, Beijing, China

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hypothyroidism and hypothyroidism. Furthermore, we investigated the treatment effects of levothyroxine (L-T4) on serum Hcy level and kidney function in hypothyroidism patients, and the association between the changes of Hcy and kidney function after L-T4

Article Type:
Research Article
DOI:
https://doi.org/10.1530/EC-21-0069
Volume/Issue:
Volume 10: Issue 5
Open access
Qing Zhou Department of Endocrinology, Fujian Maternity and Child Health Hospital, Fujian Children’s Hospital, Fuzhou, China

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Li Yong Zhang Department of Thyroid Surgery, Minimal Invasive Center, Fujian Medical University Union Hospital, Fuzhou, China

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Mei Feng Dai Department of Clinical Lab, Fujian Maternity and Child Health Hospital, Fuzhou, China

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Zhen Li Department of Endocrinology, Fujian Maternity and Child Health Hospital, Fujian Children’s Hospital, Fuzhou, China

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Chao Chun Zou Department of Endocrinology, The Children’s Hospital, Zhejiang University School of Medicine, Hangzhou, China

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Hui Liu Department of Endocrinology, Fujian Maternity and Child Health Hospital, Fujian Children’s Hospital, Fuzhou, China

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exhibited elevated serum TSH levels but maintained normal thyroid hormone levels compared to control mouse. To normalize TSH levels, mice with subclinical hypothyroidism were provided with levothyroxine in their drinking water for 2 weeks. Levothyroxine (5

Article Type:
Research Article
Collections:
Thyroid
DOI:
https://doi.org/10.1530/EC-23-0302
Volume/Issue:
Volume 13: Issue 8
Open access
Kusum Lata Departments of Obstetrics and Gynecology, Endocrinology, Pharmacology, Post Graduate Institute of Medical Education and Research (PGIMER), Chandigarh, India

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Pinaki Dutta Departments of Obstetrics and Gynecology, Endocrinology, Pharmacology, Post Graduate Institute of Medical Education and Research (PGIMER), Chandigarh, India

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Subbiah Sridhar Departments of Obstetrics and Gynecology, Endocrinology, Pharmacology, Post Graduate Institute of Medical Education and Research (PGIMER), Chandigarh, India

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Minakshi Rohilla Departments of Obstetrics and Gynecology, Endocrinology, Pharmacology, Post Graduate Institute of Medical Education and Research (PGIMER), Chandigarh, India

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Anand Srinivasan Departments of Obstetrics and Gynecology, Endocrinology, Pharmacology, Post Graduate Institute of Medical Education and Research (PGIMER), Chandigarh, India

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G R V Prashad Departments of Obstetrics and Gynecology, Endocrinology, Pharmacology, Post Graduate Institute of Medical Education and Research (PGIMER), Chandigarh, India

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Viral N Shah Departments of Obstetrics and Gynecology, Endocrinology, Pharmacology, Post Graduate Institute of Medical Education and Research (PGIMER), Chandigarh, India

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Anil Bhansali Departments of Obstetrics and Gynecology, Endocrinology, Pharmacology, Post Graduate Institute of Medical Education and Research (PGIMER), Chandigarh, India

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) . This study will evaluate the obstetric outcome in pregnant women with recurrent miscarriage and response to levothyroxine ( l -T 4 ) therapy. Research design and methods One hundred pregnant and 25 non-pregnant women between 21 and 35 years of age with

Article Type:
Research Article
DOI:
https://doi.org/10.1530/EC-13-0012
Volume/Issue:
Volume 2: Issue 2
Open access
Ulla Schmidt Endocrine Unit, Department of Medicine, Endocrine Unit, Faculty of Health Sciences, Department of Medicine O, Herlev University Hospital, Herlev Ringvej, DK-2730 Herlev, Denmark

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Birte Nygaard Endocrine Unit, Department of Medicine, Endocrine Unit, Faculty of Health Sciences, Department of Medicine O, Herlev University Hospital, Herlev Ringvej, DK-2730 Herlev, Denmark

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Ebbe Winther Jensen Endocrine Unit, Department of Medicine, Endocrine Unit, Faculty of Health Sciences, Department of Medicine O, Herlev University Hospital, Herlev Ringvej, DK-2730 Herlev, Denmark

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Jan Kvetny Endocrine Unit, Department of Medicine, Endocrine Unit, Faculty of Health Sciences, Department of Medicine O, Herlev University Hospital, Herlev Ringvej, DK-2730 Herlev, Denmark

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Anne Jarløv Endocrine Unit, Department of Medicine, Endocrine Unit, Faculty of Health Sciences, Department of Medicine O, Herlev University Hospital, Herlev Ringvej, DK-2730 Herlev, Denmark

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Jens Faber Endocrine Unit, Department of Medicine, Endocrine Unit, Faculty of Health Sciences, Department of Medicine O, Herlev University Hospital, Herlev Ringvej, DK-2730 Herlev, Denmark
Endocrine Unit, Department of Medicine, Endocrine Unit, Faculty of Health Sciences, Department of Medicine O, Herlev University Hospital, Herlev Ringvej, DK-2730 Herlev, Denmark

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healthy euthyroid subjects, ∼20% of T 3 is derived from thyroidal secretion and the remaining from local production (2) . By contrast, hypothyroid subjects substituted with levothyroxine ( l -T 4 ) monotherapy demonstrated higher plasma T 4 /T 3 ratio

Article Type:
Research Article
DOI:
https://doi.org/10.1530/EC-12-0064
Volume/Issue:
Volume 2: Issue 1
Open access